a bit too upscale for me. doesn't look like something one would wear casually. id worry the girl is high maintenance. but if its her style and she turns out not to be high maintenance, then sure, wear it.
I suppose, if an attractive woman were to wear a trenchcoat unbuttoned, with next to nothing covering herself underneath (as the woman in the picture), most men would tend to view this as a "hot" piece of apparel. Though, if worn normally, I shouldn't think trenchcoats would score very highly in a poll of "hot" clothing. After all, any piece of clothing named after a hole in the mud has much to make up for.